Construction and empirical study of a panoramic carbon flow model for high-speed railway bridge construction

LI Min; WANG Yinsheng; SUN Jiazhen; LIU Jie; WANG Minglu; ZHAO Peng; ZHU Li

doi:10.13205/j.hjgc.202605024

Volume 44 Issue 5

May 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(5): 236-244

LI Min, WANG Yinsheng, SUN Jiazhen, LIU Jie, WANG Minglu, ZHAO Peng, ZHU Li. Construction and empirical study of a panoramic carbon flow model for high-speed railway bridge construction[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(5): 236-244. doi: 10.13205/j.hjgc.202605024

Citation:

LI Min, WANG Yinsheng, SUN Jiazhen, LIU Jie, WANG Minglu, ZHAO Peng, ZHU Li. Construction and empirical study of a panoramic carbon flow model for high-speed railway bridge construction[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(5): 236-244. doi: 10.13205/j.hjgc.202605024

Citation:

LI Min, WANG Yinsheng, SUN Jiazhen, LIU Jie, WANG Minglu, ZHAO Peng, ZHU Li. Construction and empirical study of a panoramic carbon flow model for high-speed railway bridge construction[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(5): 236-244. doi: 10.13205/j.hjgc.202605024

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Construction and empirical study of a panoramic carbon flow model for high-speed railway bridge construction

doi: 10.13205/j.hjgc.202605024

1. China Railway Academy Group Co., Ltd., Chengdu 610032, China;
2. Jinan Survey and Design Institute of China Railway 10th Bureau Group Co., Ltd., Ji'nan 250101, China;
3. School of Municipal and Environmental Engineering, Shandong Jianzhu University, Ji'nan 250101, China

Received Date: 2025-10-09
Available Online: 2026-06-06

Abstract

Abstract

The refined quantification of carbon footprint of engineering construction projects serves as a key pillar for formulating targeted carbon reduction strategies and advancing low-carbon development in the industry during the materialization phase. In this study， material flow analysis （MFA） was integrated with the emission factor method to establish a panoramic carbon flow model for engineering projects. Construction activities were categorized into two types： processing and construction， and office and daily operations. The material flow and carbon flow relationships within the defined system boundary and with external systems were clarified， and an empirical analysis was conducted using the Hejiawan Bridge of Section 11 of the Xiyu High-Speed Railway as the case. The results demonstrate that the total carbon flow of the Hejiawan Bridge amounts to 27，482，432.11 kg CO₂eq， of which direct carbon flow （including fuel oil， gasoline， etc.） accounts for 7.6%， and indirect carbon flow （including products， transportation， electricity consumption， etc.） accounts for 92.4%. From the perspective of material flow， the total carbon flow is composed of five categories： product carbon flow （72.88%）， resource and energy carbon flow （25.73%）， transportation carbon flow （1.04%）， waste carbon flow （0.35%）， and service carbon flow （0.01%）. In terms of the scope of carbon emission activities， carbon flow associated with construction accounts for 99.17%， while that related to office and daily operations accounts for 0.46%. Two indicators， namely material consumption carbon flow rate and energy consumption carbon flow rate， were proposed for the first time for the carbon flow assessment of bridge construction. A comparative analysis was performed on five girder bridges. The results indicate that the material consumption carbon flow rate of the Hejiawan Bridge is 3.91 kg CO₂eq/kg， ranking the highest among bridges of the same type， while its energy consumption carbon flow rate is 13.40 kg CO₂eq/kg ec， which falls at a medium level. The assessment reveals that the material consumption of the bridge is relatively high. Carbon reduction potential can be explored and targeted emission reduction pathways can be designed by considering factors such as the bridge structure and construction geological conditions.
- bridge construction,
- engineering materialization-stage carbon,
- material flow,
- panoramic carbon flow model,
- carbon flow rate

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References(22)

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